Avi Loeb said bases this hypothesis on a July 21 image captured by the Hubble Space Telescope and shared by NASA.

Interstellar object 3I/ATLAS shows unexpected frontal glow that Harvard's Avi Loeb says cannot be explained by sunlight reflection or standard cometary outgassing.

A respected Harvard astrophysicist has shared new claims about the mysterious interstellar object in our Solar System, saying ...